'05 545i

Car seems to have developed new BMW technology... the comfort braking feature. When you step on the brakes too hard, the brake pedal pushes up back against your foot (not an ABS pulse... but physically pushes back). When you reach 70% stopping capacity... the brake pedal pushes you back to 60%. The faster you try to go past 70%, the faster it pushes back.

If you slam brakes to 100%... you get about a second of ABS activity before the pedal pushes you back to 60%. If you slowly hit 70% braking, it slowly pushes you back to 60%.

As you can imagine... this makes for much longer stopping when you think you can actually get to the ABS.

Thoughts? Anybody have similar experiences?

Turns out it there was a hole in the brake booster.

wait can you explain that more. . .so the pushing back of the pedal was due to a malfunction/damage to the brake booster?

wait can you explain that more. . .so the pushing back of the pedal was due to a malfunction/damage to the brake booster?
Yes... at least, that's what they attributed the problem to. They originally thought that new pads/rotors would fix the problem. It didn't. So they changed out the ABS unit... no luck. Then they swapped out the brake booster when they found the hole and *poof* problem went away.

I was going to go with you don't know how to drive Kevin.

I was going to go with you don't know how to drive Kevin.
You should have seen my trying to explain it to the techs at BMW... they all thought I was crazy. We had to go and grab a new 550 off the lot so I could demonstrate the problem in the 545 versus a new 550. That's when the lightbulb went off in there head and they said "that's odd".